are there any side effects from having b12 injections of Injection (Common and Serious) What Does a B12 Shot
Description
What cycling entails is taking a short break from using a peptide after a period of regular administration, preventing desensitization and minimizing the risk of any long-term side effects

Johns Hopkins Medicine says you may have to continue taking vitamin B12 for the rest of your life if your body cannot recover from the deficiency
Insulin Syringes (U-100) One fresh syringe per injection

Circulation (2009) 120(23):237785
